Example of software design

How do the different methodologies handle software design and modeling? Skip to main content. Home » Software Design and Modeling. This solution involves a lot of refactoring and can sometimes make it difficult to keep track of the bigger picture.

This tends to provide an initial solution that works for a limited set of requirements. An approach on the other extreme is to attempt to design as much as possible before implementation. This approach requires a fairly complete understanding of the requirements, but tends towards creating a solution that fits the needs of the entire system over the needs of each sub-component. There are many good choices between these two extremes. Try to think of the overall big issues up front and create a design that addresses those problems.

As you start to implement your design you may discover new problems that alter or add to your design and you may have to refactor your code to account for these changes, however these changes should be small. Hence, you could define a common security component. The security component only bothers about whether a given user has the right access and the right credentials - nothing else. It can be easily reused across multiple microservices. It is highly cohesive.

It does security and it does it very well. Note that if you try to enhance the features of the Security component by adding a logging capability as well, then its reusability goes down greatly.

Both security and logging are better off implemented separately, as independent cohesive reusable components. The framework is not implemented as one big component. It is organized as a set of modules, each one of which can be composed of smaller components. Here is how it is organized, in brief:. Each component has its own boundary; it is concerned with taking up a single responsibility, and doing it well. The more cohesive a component is, the more reusable it becomes.

The modular structure of the Spring framework enables a programmer to pull in only those components that she actually needs. Keep your design docs easily accessible to all stakeholders by keeping them in your shared drive or your internal knowledge base , making them easily discoverable and searchable.

There are no set rules about the length of a software design document. But keep in mind that the longer your document is, the more effort it would take for you to keep it up-to-date and for your readers to absorb. Keep it under five pages if you can and use clear, simple language when describing your solution to your team. Your design will evolve, and so should your document. To keep all the stakeholders on the same page, you would want to update the document every time you make changes to the original solution or update the scope or timeline of your project.

To draw the attention of the stakeholders to a particular update in Nuclino, simply -mention them and they will get an instant notification. Track the evolution of your design document and restore earlier versions if necessary using the version history. As your project moves forward, the design doc will be there to keep everyone on track, saving your team from getting buried in details and keeping in mind the larger vision for the product. And if you end up losing confidence in the proposed solution while writing the document, see it as a win rather than a waste of time.

As long as the design document helps you weed out projects that are not practical or viable, it was worth the time you invested in writing it. Nuclino brings all your team's knowledge, docs, and projects together in one place. It's a modern, simple, and blazingly fast way to collaborate, without the chaos of files and folders, context switching, or silos. Try it now. What is a software design document?

The spell check feature in word processor is a module of software, which runs along side the word processor itself. When a software program is modularized, its tasks are divided into several modules based on some characteristics. As we know, modules are set of instructions put together in order to achieve some tasks.

They are though, considered as single entity but may refer to each other to work together. There are measures by which the quality of a design of modules and their interaction among them can be measured. These measures are called coupling and cohesion. Cohesion is a measure that defines the degree of intra-dependability within elements of a module. The greater the cohesion, the better is the program design. Coupling is a measure that defines the level of inter-dependability among modules of a program.

It tells at what level the modules interfere and interact with each other.